Ice-cream freezer



April 14, 1925. a 1,533,708

L. S. PFOUTS ICE CREAM FREEZER Filed Sept. 23, 1924 5 Shets-Sheet 1 a N) v April 14, 1925. 1,533,708

L. S. PFOUTS VICE-CREAM FREEZER Filed Sept. 23 1924 3 Sheets-Sheet a A pril 14, 1925. 1,533,708

L. s. PFouTs ICE CREAM FREEZER v Filed Sept. 25, 1924 is Sheets-Sheet s gwvmdof attoznegrd' Patented Apr. 14, 1925.

PATENT 1,533,708 OFFICE.

LEROY s. Hours, or can'ron, onro.

' ICE-CREAM FREEZER.

Application filed September 23, 1924. Serial No. 739,310.

To (ZZZ-whom it may concern:

Be it known that I, Lnaor S. ProU'rs, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented new and useful Improvements in Ice-Cream Freezers, of which the following is a specification.

The invention relates to freezers for mak-.

ing ice cream and like products wherein a p sterile inert gas is incorporated with the ice cream for the purpose of displacing the impure air which would otherwise constitute a large proportion of the ice cream and" would be a dangerous deteriorating ingrediant-unless displaced by the inert gas.

Sterile gas bearing ice cream has been 2 judge the amount of gas necessary to force into the chamber, and if,'after the freezing operation has commenced, it is desired to introduce more gas, it is necessary to stop the freezing mechanism, and reinsert the tube. It has moreover been found that the air remaining in the chamber after it has been partially filled with the liquid ingredients will mix with the incoming gas so that it ispractically impossible to make ice cream 5 in which all the voids are filled with a sterile inert gas.

The objects of the present invention are to provide a freezer in which all the air in the freezer'chamber is preferably displaced by a sterileinert gas before the li uid ingredients are introduced, and in which there are co-ordinated valve means incorporated in the freezer for admitting the original gas,

and for admitting more gas if desired after the freezing operation has been started without necessitating the stopping of the freezer mechanism.

A further object of the invention is taprovide a plurality of circumferentially s raced inlet ports for the gas, in order 'to a oid a tendency of the gas to localize when it is injected into the chamber from the end of a single tube. v

i Another object of the invention is to insure the-thorough mixing of the inert gas and subsequently introduced liquid ingredients, and to improve the smoothness and quality of the ice cream, by providing a freezing mechanism including scrapers,-spirally arranged lifting blades, and whipping rods which-constantly lift the freezing mixture from the bottom of the freezer chamber and agitates it in contact with the inert gas for filling the voids of the ice cream with the gas as it is frozen.

The invention is illustrated in the accompanying drawings forming apart hereof, in which Figure 1 is a front elevation of the improved ice cream freezer;

Fig. 2, a side elevation of the same show ing the motor drive;

Fig. 3, a longitudinal cross-section of the same, as on line HIIII, Fig. 4:;

Fig. 4, a top plan view of the same showing the air-valves in longitudinal cross-section as on line IV1V, Fig. 3; and

Fig. 5, a transverse cross-section of the same, as on line VV, Fig. 3.

Similar numerals refer to similar parts throughout the drawings.

The improved freezer indicated at F, includes a base 1 upon which is mounted a vertical supporting column 2 carrying at its upper end a mounting ring 3.

A gas inlet channel ring 4, and an air valve and blade and scraper drive shaft upper bearing head 5 are seated upon the mounting ring as shown, while a discharge gate and blade and scraper drive shaft lower bearing head 6 is spaced below the ring 3, and-mounted on the base 1.

. Between the ring 3 and head 6 are fitted and mounted as shown an inner freezer cylinder 7, a corrugated cylindrical freezing "mixture helix former 8, and an outer cylinder 9; thus forming acase having a freezing chamber C therein. A cork insulation 10 fills the space between the outer cylinder 9 and the helix former 8, and the helix former and the cylinder 7 provide a freezing mixture helix whose successive cross sections are indicated by 11.

A blade and scraper drive shaft 12 is centrally located in the freezer and journallcd in upper bearing 13 in the air head 5, and

in lower bearing 14 in the-discharge head 6. In the freezer and mounted upon the drive shaft 12, radially and vertically spaced freezing tank to reduce a smooth iceicream of high quality in'which all the Voids are filled with a sterile inert gas; 1

If for any purpose it is desired to admit more gas into the freezingchamber during the freezing operation, the by-passvalve 35 may be opened to admit-the desired amount of gas, without stopping the operation of the :scrapers, lifting blades, and whipping.

rodsp n a After freezing one batch of ice cream the batch may be removed through the discharge gate, and a new charge of inert gas may be introduced intothe freezer chamber without stoppin the operation of the scrapers, lifting bla es andI-whippingrods, so that the operation of the same together with the circulation of thebrine can becarrie'd on" introducing liquid ingredients into the.

- chamber and freezing the same'therein.

2. The method of makingice' cream and v the like in a; freezingchamber, which con-' sists in introducing a sterile inert gas into the freezing chamber to displace air there-= from, then introducing liquid. in edients into the chamber and freezing tea same therein.

" uid ingredients into the'chamber and ing andagitatin' the same therein.

3; The method ofmaking ice cream .the-like'in a freezing chamber, which consists inintroducing carbon dioxide gas into I the freezing chamber todisplace air there-- from, then introducing liquid in redientsj into the chamber and freezing t e same therein; i

4. The-method of making ice cream and the like in a freezing chamber, which eon.

sists in introducing a gas into the freezing I chamber to displace all-of the air therefrom, then introducing liquidin edients g4 into the chamber? and freezing t e 'sametherein; 5; The method of making ice cream and the like in a freezing chamber having agitating means therein which .consistsin introducing a gas into the freezing chamber to displace air therefrom, then introducin liqeez- .6. The metho of making ice cream and the like in-a freezing chamber having agi-.

tating means operating therein, which consists-1n introducing a gas into the freezing;

chamber to displace air therefrom and then introducing liquid ingredients into. the

chamber for freezin thereini' all during the i operation of the "agitating means.

.- 'In testimony that I claiin the above, It"

have hereunto; subscribed myname.

. LnRorv-vsi-rFouTs. 

